<app-footer #footer (outer)="run($event)"></app-footer>
<br>
<hr>
<br>
<div>我是一个新闻组件</div>
<button (click)="getChildrenMsg()">获取子组件的msg</button>
<br>
<br>

<button (click)="getChildrenRun()">获取子组件的run方法</button>
